Phase coexistence in NaZn13-type LaFe11.4Al1.6C0.02 compound |
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| Authors: | Jing Chen Qiao-yan Dong Li-gang Zhang Bao-gen Shen |
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| Institution: | a State Key Laboratory of Magnetism, Institute of Physics and Centre for Condensed Matter Physics, Chinese Academy of Sciences, Beijing 100190, China
b Department of Applied Physics, Wuhan University of Science and Technology, Wuhan 430065, China |
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| Abstract: | In NaZn13-type LaFe11.4Al1.6C0.02 compound, a signature of weak ferromagnetism is observed at ∼100 K under a low field by ac magnetic-susceptibility and electrical-resistivity measurements, implying the coexistence of ferromagnetic (FM) and antiferromagnetic (AFM) phases. The hysteresis in isofield magnetization curves and large magnetic relaxation demonstrate the metastability of the magnetic state in the AFM-FM transition region. The variations of magnetization with temperature, time and field show distinct step-like behaviors, which is probably attributed to the discontinuous growth of ferromagnetic cluster in antiferromagnetic matrix. |
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| Keywords: | NaZn13-type compound Phase transition Magnetic relaxation |
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